 /*******************************************************************************
  * Copyright (c) 2004, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.activities.ws;

 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.ui.activities.ITriggerPointAdvisor;
 import org.eclipse.ui.internal.registry.IWorkbenchRegistryConstants;
 import org.eclipse.ui.internal.registry.RegistryReader;

 /**
  * Descriptor for trigger point advisor extensions.
  *
  * @since 3.1
  */
 public final class TriggerPointAdvisorDescriptor {

     private String id;

     private IConfigurationElement element;

     /**
      * Create a new instance of this class.
      *
      * @param element
      * the configuration element
      * @throws IllegalArgumentException
      * thrown if the element is missing an id attribute
      */
     public TriggerPointAdvisorDescriptor(IConfigurationElement element)
             throws IllegalArgumentException {
         id = element.getAttribute(IWorkbenchRegistryConstants.ATT_ID);
         if (id == null
                 || RegistryReader.getClassValue(element,
                         IWorkbenchRegistryConstants.ATT_CLASS) == null) {
             throw new IllegalArgumentException ();
         }
         this.element = element;
     }

     /**
      * Return the id.
      *
      * @return the id
      */
     public String getId() {
         return id;
     }

     /**
      * Create the advisor for this descriptor.
      *
      * @return the advisor
      * @throws CoreException
      * thrown if there is an issue creating the advisor
      */
     public ITriggerPointAdvisor createAdvisor() throws CoreException {
         return (ITriggerPointAdvisor) element
                 .createExecutableExtension(IWorkbenchRegistryConstants.ATT_CLASS);
     }
 }

